Printed from: http://braemoor.co.uk/crolles/annette.shtml on 04 Dec 2024
Copyright: © 1998 - 2024 John Gardner

Réseau de la Dent de Crolles, Chartreuse

Grotte Annette Bouchacourt

Northing: 45.305975° Easting: 5.853711° Altitude: 1,718 m

How to find it

Grotte Annette Bouchacourt is located under the south nose of Dent de Crolles. From the Col du Coq follow the waymarked GR9 up the zigzags, above the Col des Ayes. At the top of the zigzags the GR9 goes off to the left towards Trou du Glaz. Follow the right-hand path up towards the Pas de l'Œille and look for a thin line crossing a shallow gully after about 20 metres. This becomes a more distinct path on the other side of the gully, and it ascends gently to a distinct traverse round the crumbling Ravin Gorgette. The path continues round the south pillar of Dent de Crolles, and traverses on shale ledges for a couple of hundred metres. There may be fixed ropes for protection. Grotte Annette Bouchacourt is at the foot of the limestone cliffs on a platform 30 metres or so above the traverse, and is accessed by a thin ascending path through the loose scree and vegetation. Once at the right level, the entrance of Grotte Chevalier is on the right. Traverse back south-west at the same level for 100 metres to find the entrance to Grotte Annette. The cave is named after one of Chevalier's team who died in a skiing accident in 1944, and there is a marble plaque to her memory by the entrance.

Map of Dent de Crolles showing position the of Grotte Annette Bouchacourt on the IGN 1:25000 map 3334OT.
The actual location is about 100 metres SW of the IGN-marked location.
Showing location of Grotte Annette Bouchacourt on the IGN 1:25000 map 3334OT
The actual location is about 100 metres SW of the IGN-marked location
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Showing the location of Grotte Annette Bouchacourt on Géoportail.
Showing the location of Grotte Annette Bouchacourt on Géoportail
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Traversing across to the Grotte Annette Bouchacourt.
Grotte Chevalier can be seen in the background adjacent to the caver.
Photograph: Dave Checkley.
Traversing across to the Grotte Annette Bouchacourt - Photograph: Dave Checkley
Grotte Chevalier can be seen in the background adjacent to the caver
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The entrance of Grotte Annette Bouchacourt.
The entrance of Grotte Annette Bouchacourt
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The memorial plaque at the entrance to Grotte Annette Bouchacourt.
The memorial plaque at the entrance of Grotte Annette Bouchacourt
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Further information

Grotte Annette Bouchacourt was first entered by cavers in 1943, and connected to the main system in 1946 by Chevalier's team after some protracted digging. The entrance is the upstream end of a large phreatic trunk route that once flowed through to Trou du Glaz. Because the water was running down dip and rising up large phreatic risers, upward pitches prevent through trips from this end unless they have been pre-rigged. It is normally used as an exit, most often from Trou du Glaz, but equally realistically from Gouffre Pulpite or P40. An entertaining couple of hours caving can be enjoyed as far as the base of Puits de la Gnole, but the way marking tends to be misleading as it is designed to help people on their way out, rather than those going in. Such a trip can be combined with a sortie into Grotte Chevalier.

The through trip from the Trou du Glaz is probably the most straightforward of the pull-through trips in the Réseau de la Dent de Crolles, and it provides an excellent introduction to the system. The pitch heads are all equipped with pull-through chains and traverse lines, and the various traverses encountered en route are also equipped with traverse lines. There is one short upward pitch equipped with a fixed rope, although it can be free-climbed in extremis. The route is used for commercial adventure trips, so one can be pretty confident that the fixed rigging will be there. There used to be a very unstable boulder choke / scree funnel in the entrance series, but this was stabilised with some serious iron work in 2011.

See here for details of the pull-through from Trou du Glaz produced by the Spéléo Secours Isère. It has been loosely translated by the author, and that version is available here. Use it at your own risk... The route is also described, with a specially drawn survey and with photographs, in an informative article by Serge Caillaut in Spéléo Magazine 107 (2019), available on bone fide request.